12749740547781 has 16 divisors (see below), whose sum is σ = 17898054299840. Its totient is φ = 8050810993920.

The previous prime is 12749740547779. The next prime is 12749740547827. The reversal of 12749740547781 is 18774504794721.

12749740547781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12749740547781 - 2¹ = 12749740547779 is a prime.

It is a super-2 number, since 2×12749740547781² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12749740547711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22730500 + ... + 23284653.

It is an arithmetic number, because the mean of its divisors is an integer number (1118628393740).

Almost surely, 2^{12749740547781} is an apocalyptic number.

It is an amenable number.

12749740547781 is a deficient number, since it is larger than the sum of its proper divisors (5148313752059).

12749740547781 is a wasteful number, since it uses less digits than its factorization.

12749740547781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46020036.

The product of its (nonzero) digits is 110638080, while the sum is 66.

The spelling of 12749740547781 in words is "twelve trillion, seven hundred forty-nine billion, seven hundred forty million, five hundred forty-seven thousand, seven hundred eighty-one".